A large group of derivatives of 3-furoic acid and 3-furyl ketones can be prepared in high yield by a process which consists of reacting an .alpha.,.beta.-unsaturated ketone having either an .alpha.-carboalkoxy or .alpha.-acyl group with N-bromosuccinimide and thermally cyclizing the resulting bromine containing intermediate.
                            一种方法可以制备3-呋酸和3-
呋喃酮的大量衍
生物,其产率高,该方法包括将具有α-羧甲酰基或α-酰基基团的α,β-不饱和酮与N-
溴代琥珀
酰亚胺反应,然后热环化生成含
溴中间体。